Big Tech faces a historic legal showdown. A major trial over social media addiction has begun and could reshape the technology industry. Meta CEO Mark Zuckerberg testified before a jury for the first time over claims that social media harms young people. His testimony came more than four years after leaked internal documents suggested the company knew its platforms could…

U.S. President Donald Trump said he plans to appoint a new artificial intelligence adviser, often called an AI czar, and create an AI force. He shared the announcement on social media on Saturday. He did not provide details about how either initiative would work or when they would begin. The announcement comes as debate over artificial intelligence grows in Washington.…